new yobe



Dec. 22, 1925.

R. E. BAKER ET AL-- cuvmEri Filgd March 28., 1921 INVENTOR.5 Kpierllfidler EATTORNEY:

I ROBERT ELMEB BAKER, OI BBONXV'ILLE,

' KA'IONAH, NEW YORK, ASSIGNOBS TO JOSEPH BAKER connecting them.

. plan view of tion on partial vertical section, 1011 an enl Patented Dec. 22, 1925.-

UNIT,

ED STATES PATENT; omen,

AND LAURENCE SEYIOUB HARDER, OI

GONS & PERKINS OOIPLNY,

INC., 01 WHITE PLAINS, NEW YORK, A. CORPORATION 01' NEW YORK.

Y oonvnrnn' Application manual 28,1991. Serial at. 458,099. f I

To all whom it concern:

Be it known that we, ROBERT Emma BAKER and LAURENCE SEYMOUR HARBnR,- both subjects of the King of Great Britain, and residents, respectively, of Bronxville and of Katonah, both in the county of Westchester and State of New York, have invented certain new and useful Improvements in Conveyers, of which the following is a specification.

Our present invention'relatesto conveyers, particularly of the type which comprises two spaced chains and transverse members We have devised our present conveyer with especial reference to the conditions arising inconnection with baking ovens of the travelingmplate or hearth character, in which bread, iscuit and like material is baked direct on the plate or hearth; but it ecific use illustrated herein. A satisfactory and preferred embodiment of our invention is shown in the accompany- 'ing drawings in which. Fig. 1 1s. a part al the. improve conveyer, with some parts broken away line 1-1 of Fig. 2, the latter bein a artial vertical sectlon on. line .2-2 o Fig. 1, with parts broken away;

' arged 33 of Fig. 1; Fig. 4: is a scale,-on line the entire widt of tial plan view showing the conveyer; Fig; 5 is a detail longitudinal section on line 5-5 of Fig. 4, on an enlarged scale; and Fi 6 is a detail view of a'cham pivot and bus ing.

The conveyer is re resented in connection with the walls A an stationary tracks B of a baking ovenof any approved type. Such conveyer consists of a continuous series 0 plates 10, preferably rectangular, the long edges of which extendtransversely of th rection (indicated by the section llne 5--5 of Fig. 4) in which the conveyer is arranged to travel. On the straight, generally horiaontal runs of the conveyer the adiacent edges of neighboring plates 10 are a most,

v no space is veyer plates,

4 but not quite in contact with each other, see

Figs. 2 and 5. In Fig. 4, on account oi the small scale on which this view is drawn,

shown between neighboring conbut it will be understood that nated as 11". bated centrally will be understood that we 'do not wish to restrict ourselves to the and others in secv' Fig. 3 is a] f 14. Each of th moving the cotter the actual conditions are late 10, which .is a I Figs. 2 and 5. Each iiat metal plate, is attac ed rigidly by weldmg or other suitable procedure, to a cross member 11, preferably I-shaped in cross section', arranged at the center of'the plate, and

drawings. At each end, the web of the cross member 11 has an opening 11', or in other words, the ends of said web are forked, see

extending downwardly therefrom on the up perconveyer run which is shown in the Fig.3, where the fork members are desig- 55 A vertical pivot pin 12, lo-

(Figs. 1 and 3 and fitted loosely in suitable openings of the fork members 11", extends through a vertically-perforated lu 13' in 7 tegral with a plate or bracket 13 riveted or otherwise secured rigidly to onev of the links 14 or 14 ofa conveyer chain C or I), located ad acent to the respective tracks B. {The chains C, D may be of any suitable construction;

gether, alternating with pairs of morewidelv spaced links 14", horizontal pivot pins-15 to. connect the four adjacent ends of two neighboring pairs of linksll, 14'. On these pins are mountedto rotate, with the interwith respect to said web we have shown them as compris mg pairs of links 14 set relatively close toposition of bushes 16, rollers vl' i adapted to run-0n the tracks B. The inner ends of the pins 15' are shown reduced and flattened on two sides to fit into similarly shaped. holes in the inner chain links 14', the outer chain links 14' having round holes to fit the body The bushings 16 are 10056 on the pins 15, and have reduced ends, flatof the pin 15.

tened on opposite sides, to" fit into correspondingly shaped holes in the chain links e pins 12 is provided with an annular horizontal eration with a cotter pin 18 inserted through a corresponding horizontalhole in the lug 13'. In this manner the held 'in the connecting pos1tion,but upon rechain C or D, for repairs or other purposes. 1

Preferably the ends or sidesof the plates. 10

pin 12 isnormally I groove 12' for cooppin 18 the pin 12 may be project beyond the ends of the supporting1 cross members 11 (Fig. 3) and are adapte to extend over, and rest upon, the upper 1 edges of the respective links 14, or 14, see

Figs. 2 and 3.

It'will be understood that the chains G,

D will usually be endless chains, the lates 10 forming an endless conveyer, guide and operated in any suitable manner, and that means of any suitable or approved type may be employed to heat the plates 10 so as to bake the bread, biscuit, etc. placed thereon.

At their adjacent edges the plates 10 are provided with fingers 10 each having one end secured to thelower surface of the plate and the other end bent away from the plate and projected toward the neighboring plate.

These projections are located at intervals,

see Fig. 4, and the projectionsat the adjacent edges of different plates are located side by side, that is to say, out of long tudinal registry; for the sake of illustrating this feature more clearly, we have shown the last narily employed. It will be noted that the plate 10 at the right of Fig. 4, as shifted or moved awa from the adjoining plate to the left, it eing understood that in actual use the plates 10 are almost contiguous, as

' illustrated by Figs. 2 and 5.

Our improved conveyer is superior in several respects to those of constructions ordiunit and the corresponding plate 10 can swing in parallel planes, the plate 10 swinging in its own plane. This peculiar connection is of great practical advantage. Assuming, for instance, that on account of defects in some of the links, or of unequal wear,

one of the chains C should at a certain moment advance or lag behind, relatively to the other chain D, at the points where such chains are connected with one of the plates 10, the improved construction described above will permit the particular links involved to. swing slightly on the pins 12, and at the same time will avoid any strains that would tend to distort the plate and to warp it from its proper plane condition. This will be understood best by considering the conditions that obtain when a plate of the character ,set forth is secured rigidly, and not pivotally, to the two chains which cause it to travel, such rigid connection being customary in similar constructions employed hitherto. It will be obvious that with the far as an y with the lateral earlier construction, any tendency of one of the chains to advance or lag relatlvely to the other chain, at the points where the said chains are connected with the same plates,

will result in either distorting the fiat surthe flush character of the joint between adjacent'plates, or else the plate, in order to preserve a flat surface, will tend to become detached from or loosened on the chains. The lagging behind of one of the chains will also tend to twist each chain unit diagonally aci'oss'the center line of the strand of chain, producing abnormal stress in the chain links and chain pivots, and therefore necessitating a heavier construction of the chain than is normally required to resist the direct pull employed in feeding the chainand' plate along the guides and through the oven. It will be clear. that. with our improved construction all stresses in the chains, with the exception of tension stresses and of stresses resulting from the weight of the face of the plate and thus upset or destroy plates- 10 and cross members 11 supported by the chains, will be entirely eliminated, also that no stresses tending to produce warping will be produced in the plate by any differential or irregular motion of one chain relatively to the other.. Therefore, so stresses arising from the move ment of t e parts are concerned, there will be no tendency to-produce warping of the v plateslO.

However, the plates 10 are also exposed to the warping influence of the heat applied for the treatment of the bread or other ma 'terial resting on the plates and conveyed thereby. To guard against this warping by heat, we have provided the projections or fingers 10 referred to above, these strips being secured to the neighboring edges of adjacent plates in pairs, the two fingers of the same pair being 1n close proximity to each other. Since each plate 10 extends over the ends of the fingers 10' projecting from the adjacent plate, and since the edge of such overlapping plate is in en agement with said fingers 10, adjacent to t e points at which they project from the plate carrying them, it will be evident that .(in view of the reciprocal arrangement of fingers and plates) the plates W111 be kept from being warped by the heat, or at least the adjacent plate edges will be preserved in flush and close relation, almost in abutment with each other. 0n the straight portions of the conveyer the plates 10 will therefore form a practically continuous and level or plane surface.

Inasmuch as the transverse members 11 are not subject to any strains except those resulting from the weight of the plates 10, these members 11 may be made relatively weak or light.

Various modifications may be' made with 6 dinal traveling members, cross members each comprising ahplate and a central bar perpendicular to the plane of said plate and forked at the ends, lugs projected from said longitudinal members into the forked ends l ofsaid bars, and means for connecting said lugs and bars pivotally.

2. A conveyer comprising spaced longitudinal traveling members, cross members each comprising a plate bridging the space be-. tween said traveling members and a bar perpendicular to the plane of said plate extending along said plate and in longitudinal contact therewith, and means fortconnecting said bar pivotally with the respective longitudinal members.

3. A conveyer comprising spaced longitudinal traveling members, cross members connecting said longitudinal members and including plates having adjacent edges perpendicular to the direction of travel, and

anti-warping fingers projected from each of two adjacent plates toward and beyond the near edge of the companion plate.

4. A conveyer comprising spaced longitu- I dinal traveling members, cross members connecting said longitudinal members and including plates having their transverse edges adjacent to each other, and fingers projected in pairs from adjoining points of two adjacent plates toward and beyond the near edge of the companion plate and engaging the same.

5. A conveyer comprising spaced longitudinal members, cross members connecting said longitudinal members and including plates having their transverse edges adjacent to each other, and ere pro ected from each of two adjacent ates toward and beyond the near ed e of the companion plate and en aging sal edge, the free end of each emg bent away from the adjacent plate.

specification.

In testimony whereof we have. signed this 

